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    Doctors pushing emergency stretcher bed in corridor at hospital — Stock Photo
    Doctors pushing emergency stretcher bed in corridor at hospital
    Surgeons adjusting oxygen mask on patient in operation theater of hospital — Stock Photo
    Surgeons adjusting oxygen mask on patient in operation theater of hospital
    Cancer cells with blood vessel formation — Stock Photo
    Cancer cells with blood vessel formation
    Crop unrecognizable medic using pulse oximeter on finger of patient for examining symptoms of COVID 19 in hospital — Stock Photo
    Crop unrecognizable medic using pulse oximeter on finger of patient for examining symptoms of COVID 19 in hospital
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    Paramedic giving oxygen to injured girl at accident spot — Stock Photo
    Paramedic giving oxygen to injured girl at accident spot
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    Close-up of senior patient wearing oxygen mask lying on hospital bed — Stock Photo
    Close-up of senior patient wearing oxygen mask lying on hospital bed
    Front view of thoughtful mixed-race female patient lying in bed while pulse oximetry measures oxygen saturation in the blood in ward at hospital. — Stock Photo
    Front view of thoughtful mixed-race female patient lying in bed while pulse oximetry measures oxygen saturation in the blood in ward at hospital.
    Leaf epidermis, light micrograph. Leaf epidermis has small pores, called stomata, which open up for photosynthetic gas exchange and transpiration. — Stock Photo
    Leaf epidermis, light micrograph. Leaf epidermis has small pores, called stomata, which open up for photosynthetic gas exchange and transpiration.
    Front view of beautiful mixed-race female doctor in hijab giving medicine to mixed-race female patient in the ward at hospital. — Stock Photo
    Front view of beautiful mixed-race female doctor in hijab giving medicine to mixed-race female patient in the ward at hospital.
    Group of surgeons performing operation in operation room at hospital — Stock Photo
    Group of surgeons performing operation in operation room at hospital
    Man talking on mobile phone and paramedics examining injured boy on street in background — Stock Photo
    Man talking on mobile phone and paramedics examining injured boy on street in background
    Blue sky with clouds, snowy mountains and forest behind the road. Road through Yosemite National Park, America, USA — Stock Photo
    Blue sky with clouds, snowy mountains and forest behind the road. Road through Yosemite National Park, America, USA
    Doctors pushing emergency stretcher bed in corridor at hospital — Stock Photo
    Doctors pushing emergency stretcher bed in corridor at hospital
    Team of doctors putting oxygen mask on a male senior patient face in the hospital — Stock Photo
    Team of doctors putting oxygen mask on a male senior patient face in the hospital
    Team of doctors putting oxygen mask on a male senior patient face in the hospital — Stock Photo
    Team of doctors putting oxygen mask on a male senior patient face in the hospital
    Scenic view of scuba divers silhouettes swimming under water — Stock Photo
    Scenic view of scuba divers silhouettes swimming under water
    Doctor practicing bag-valve-mask ventilation on training dummy. — Stock Photo
    Doctor practicing bag-valve-mask ventilation on training dummy.
    Medical team examining pregnant woman during delivery in operating room — Stock Photo
    Medical team examining pregnant woman during delivery in operating room
    Snake red blood cells. Coloured scanning electron micrograph (SEM) of whole and fractured red blood cells (erythrocytes, red) in a small blood vessel of a snake — Stock Photo
    Snake red blood cells. Coloured scanning electron micrograph (SEM) of whole and fractured red blood cells (erythrocytes, red) in a small blood vessel of a snake
    Boy in oxygen mask using nebulizer during inhalation while sitting on sofa and reading book — Stock Photo
    Boy in oxygen mask using nebulizer during inhalation while sitting on sofa and reading book
    Using pulse oximeter at home to test oxygen level in blood. — Stock Photo
    Using pulse oximeter at home to test oxygen level in blood.
    Construction of plastic tubes and tools for treating animals in operating room of veterinary clinic — Stock Photo
    Construction of plastic tubes and tools for treating animals in operating room of veterinary clinic
    Group of surgeons performing operation in operation theater of hospital — Stock Photo
    Group of surgeons performing operation in operation theater of hospital
    3d illustration of red blood cells erythrocytes. — Stock Photo
    3d illustration of red blood cells erythrocytes.
    Female patient with nasal cannula. — Stock Photo
    Female patient with nasal cannula.
    Empty wheelchair with hanging oxygen mask in bedroom at home. healthcare and lifestyle during covid 19 pandemic. — Stock Photo
    Empty wheelchair with hanging oxygen mask in bedroom at home. healthcare and lifestyle during covid 19 pandemic.
    Senior patient lying on bed with oxygen mask on face in hospital — Stock Photo
    Senior patient lying on bed with oxygen mask on face in hospital
    Paramedic giving oxygen to injured girl at accident spot — Stock Photo
    Paramedic giving oxygen to injured girl at accident spot
    Dark field light micrograph (LM) of freshwater pennate diatoms. — Stock Photo
    Dark field light micrograph (LM) of freshwater pennate diatoms.
    Portrait of mature mixed-race female patient sleeping in bed in the ward at hospital — Stock Photo
    Portrait of mature mixed-race female patient sleeping in bed in the ward at hospital
    Oxygen cylinder on cart in workshop — Stock Photo
    Oxygen cylinder on cart in workshop
    Crop unrecognizable woman using modern pulse oximeter on finger of kid for measuring oxygen level in blood — Stock Photo
    Crop unrecognizable woman using modern pulse oximeter on finger of kid for measuring oxygen level in blood
    Close up of thoughtful mixed race female patient relaxing in bed in the ward at hospital — Stock Photo
    Close up of thoughtful mixed race female patient relaxing in bed in the ward at hospital
    Elementary age asthmatic girl wearing oxygen face mask. — Stock Photo
    Elementary age asthmatic girl wearing oxygen face mask.
    Cheerful child breathing in oxygen mask during inhalation and playing with soft toy on couch at home — Stock Photo
    Cheerful child breathing in oxygen mask during inhalation and playing with soft toy on couch at home
    Crop unrecognizable doctor measuring blood oxygen of patient with heart rate monitor at table with stethoscope in clinic while using laptop — Stock Photo
    Crop unrecognizable doctor measuring blood oxygen of patient with heart rate monitor at table with stethoscope in clinic while using laptop
    Surgeons adjusting oxygen mask on patient in operation theater of hospital — Stock Photo
    Surgeons adjusting oxygen mask on patient in operation theater of hospital
    Scuba diver at the Three Amigos Dive Site, Belize Barrier Reef; Belize — Stock Photo
    Scuba diver at the Three Amigos Dive Site, Belize Barrier Reef; Belize
    Side view of little boy with asthma using inhaler while sitting on sofa at home — Stock Photo
    Side view of little boy with asthma using inhaler while sitting on sofa at home
    Oxygen mask and tube on white background. — Stock Photo
    Oxygen mask and tube on white background.
    Portrait of beautiful young mixed race female patient lying on bed with hands on stomach in the ward in hospital. Pulse oximetry is measuring the oxygen level in her blood. — Stock Photo
    Portrait of beautiful young mixed race female patient lying on bed with hands on stomach in the ward in hospital. Pulse oximetry is measuring the oxygen level in her blood.
    Content mother putting on oxygen mask on face of son for inhalation procedure while sitting on sofa at home — Stock Photo
    Content mother putting on oxygen mask on face of son for inhalation procedure while sitting on sofa at home
    Nurse consoling senior patient with doctor in hospital — Stock Photo
    Nurse consoling senior patient with doctor in hospital
    Team of surgeons with scalpel are operation together on background of surgical lamp,Point of view shot. — Stock Photo
    Team of surgeons with scalpel are operation together on background of surgical lamp,Point of view shot.
    Chicken eggshell cross section — Stock Photo
    Chicken eggshell cross section
    Red blood cells and white blood cells — Stock Photo
    Red blood cells and white blood cells
    Anesthesiologist holding oxygen mask over patients face in operating room — Stock Photo
    Anesthesiologist holding oxygen mask over patients face in operating room
    Side view of little boy with asthma using inhaler while sitting on sofa at home — Stock Photo
    Side view of little boy with asthma using inhaler while sitting on sofa at home
    Measuring oxygen levels in blood with pulse oximeter. — Stock Photo
    Measuring oxygen levels in blood with pulse oximeter.
    Side view of content sick boy using respirator and breathing oxygen from inhaler while sitting on sofa at home — Stock Photo
    Side view of content sick boy using respirator and breathing oxygen from inhaler while sitting on sofa at home
    Side view of professional male aviator in oxygen mask turning switch on control console while operating contemporary aircraft during flight — Stock Photo
    Side view of professional male aviator in oxygen mask turning switch on control console while operating contemporary aircraft during flight
    Doctor putting oxygen mask on patient in hospital — Stock Photo
    Doctor putting oxygen mask on patient in hospital
    Content sick boy using respirator and breathing oxygen from inhaler while sitting on sofa at home — Stock Photo
    Content sick boy using respirator and breathing oxygen from inhaler while sitting on sofa at home
    Surgeons adjusting oxygen mask on patient in operation theater of hospital — Stock Photo
    Surgeons adjusting oxygen mask on patient in operation theater of hospital
    Top view of crop unrecognizable woman using modern pulse oximeter on finger of kid for measuring oxygen level in blood — Stock Photo
    Top view of crop unrecognizable woman using modern pulse oximeter on finger of kid for measuring oxygen level in blood
    Front view of diverse male patients interacting with each other in the ward at hospital. — Stock Photo
    Front view of diverse male patients interacting with each other in the ward at hospital.
    View of distant small aircraft on azure heaven — Stock Photo
    View of distant small aircraft on azure heaven
    Ward boy pushing senior patient on stretcher in hospital corridor — Stock Photo
    Ward boy pushing senior patient on stretcher in hospital corridor